JP2003322043A - Electric connecting structure of component, ecu (electronic control unit), and engine control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric connecting structure of any component having good reliability even under severe conditions with much heat, vibration, etc., and sustaining electric noises. <P>SOLUTION: The pattern 2a for contacts of a base board 2 and a connecting terminal 4 of a FIAV 3 are connected together electrically by a conductive, compression coil spring 6 set in the compressed condition, and a magnetic body is installed at the axis of the coil spring 6. The surrounding area of the coil spring 6 and contacts is covered with flexible bellows 5, and molded with a molding material 8. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connection structure of parts, an ECU (Electronic Control).
l Unit) and the engine control device, more specifically, the electrical connection structure of the components that has a reliable electrical connection between the components even under severe conditions such as heat and vibration, and is resistant to electrical noise, The present invention relates to an ECU and an engine control device.

[0002]

2. Description of the Related Art For example, a fast idle air valve (hereinafter referred to as FIAV) or an idling speed controller (hereinafter referred to as ISC) in an automobile is usually connected to a control circuit board through a predetermined connector or wiring, or FIAV and ISC connection terminals are often directly connected to the control circuit board by soldering.

For example, as shown in FIG. 3, FIAV1
When the ECU 3 is provided integrally with the ECU case 1, the FI
The connection terminal 14 of the AV 13 is directly soldered to the board 2 by the soldering portion 1
5 are soldered and connected. In addition, FIAV
An O-ring 7 is attached to the concave portion 13a of 13,
The O-ring 7 is brought into pressure contact with the inner wall of the ECU case 1, whereby the internal sealing property is secured. Also FIA
The periphery of V13 (the portion above the O-ring 7), the connection terminal 14 and the substrate 2 is molded and insulated by the molding material 8. Here, FIG. 3 is a cross-sectional view showing an example of a conventional electrical connection structure of components.

Such a connection structure of electric components by soldering is also applied to, for example, an ECU and an engine control device including the same, and a circuit board and a sensor (for example,
The throttle opening sensor, the intake pressure sensor, the intake temperature sensor, etc.) are directly soldered to the circuit board via the connector wiring. Even between the internal units of various actuators (including the circuit board), they are connected by soldering in the same manner as above.

As another conventional technique, for example, a small-sized spring contact structure which is easy to assemble and mount on a printed circuit board is disclosed in Japanese Utility Model Laid-Open No. 5-45971.

[0006]

However, the conventional electrical connection structure of parts by soldering is the EC by heat.
Deformation of the U case 1, substrate 2, FIAV 13, etc., deformation / expansion of the molding material 8, deformation due to external stress, vibration, etc., causes stress in the soldering portion 15 to cause solder cracks, and reliability of the electrical connection portion. However, there is a problem that the property is deteriorated.

Further, particularly in the case of the ECU and the engine control device, it is required to provide a reliable connection structure even under severe conditions such as the above-mentioned heat and vibration, and at the same time, a connection structure that is resistant to electrical noise is required. Offer is requested.

The technique disclosed in Japanese Utility Model Laid-Open No. 5-45971 is effective as a simple mounting means on a printed circuit board, but it is necessary to solder terminals to the printed circuit board. When this is applied to an ECU or an engine control device, there is a problem that problems such as solder cracks are caused under the severe conditions such as heat and vibration as described above.

The present invention has been made in view of the above, and it is possible to provide a reliable connection structure even under severe conditions such as heat and vibration, and at the same time, improve the electrical characteristics of parts that are resistant to electrical noise. The purpose is to provide a dynamic connection structure.

It is another object of the present invention to provide an ECU or an engine control device having a connection structure which is reliable even under severe conditions such as heat and vibrations and which is resistant to electrical noise. .

[0011]

In order to achieve the above-mentioned object, an electrical connection structure for a component according to claim 1 of the present invention comprises a conductive compression coil between contacts of components to be electrically connected. In the electric connection structure of the parts, which is arranged by compressing the spring and electrically connecting the parts,
A magnetic body is provided on the axial center of the compression coil spring.

That is, the compression coil spring can be provided with a large inductance, and an electrical connection structure of parts that is resistant to electrical noise and reliable can be provided. Further, since the contacts are electrically connected via the conductive compression coil spring, the number of connector pins can be reduced as compared with the conventional connection via a connector, and
Wiring man-hours can be reduced. Also, the harness itself can be reduced, which contributes to cost reduction.

Further, in the electrical connecting structure of the component according to the second aspect of the present invention, the magnetic body is also used as the connecting terminal of the compression coil spring. As a result, the noise reduction effect can be enhanced without adding an additional member, that is, without increasing the number of members.

The electrical connection structure of the component according to claim 3 of the present invention is formed so that the periphery of the compression coil spring and the contact are covered with a flexible shield member so as to be moldable. As a result, even if the molding material or the like is deformed by heat or external stress, the shield member bends and absorbs it, and the compression coil spring also elastically deforms and absorbs it, so that excessive stress is applied to the connection portion. It is possible to effectively prevent it from being added and destroyed, and also to ensure the insulation.

An ECU according to claim 4 of the present invention
Is a circuit board and at least one sensor of a throttle opening sensor, an intake pressure sensor, and an intake temperature sensor connected by the electrical connection structure of the component according to any one of claims 1 to 3. is there. This makes it reliable even under harsh conditions such as heat and vibration.
It is possible to provide an ECU having a connection structure that is resistant to electrical noise.

According to a fifth aspect of the present invention, there is provided an engine control device, the throttle body, an ECU case for storing the ECU according to the fourth aspect, which is produced in a separate step from the throttle body, and the throttle body. It is provided with a mounting means for mounting the body and the ECU case. As a result, it is possible to provide an engine control device having a connection structure that is reliable even under severe conditions such as heat and vibrations and that is resistant to electrical noise.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an electrical connection structure of parts, an ECU and an engine control device according to the present invention will be described below in detail with reference to the drawings. The present invention is not limited to this embodiment.

Embodiment 1. 1 is a sectional view showing an electrical connection structure of components according to a first embodiment of the present invention. In the following description, the same or corresponding members as those already described will be denoted by the same reference numerals, and redundant description will be omitted or simplified.

A board 2 on which an electronic control circuit is mounted is arranged in an ECU case 1 for storing the ECU. A contact pattern 2 a is provided on the back surface of the substrate 2.
A FIAV 3 is provided in the ECU case 1. That is, the concave portion 1a is formed inside the ECU case 1, and the convex portion 3a of the FIAV 3 is fitted into the concave portion 1a. Further, an O-ring 7 is attached to the concave portion 3b of the FIAV 3, and the O-ring 7 is brought into pressure contact with the inner wall of the ECU case 1 to ensure the internal sealing property.

The FIAV 3 also has a magnetic connecting terminal 4, which is a conductive compression coil spring 6.
Has been pressed into. The tip of the compression coil spring 6 is pressed against the contact pattern 2a, so that the connection terminal 4 and the contact pattern 2a are electrically connected.

The number of turns of the compression coil spring 6 is set to an optimum number of turns for reducing electrical noise, taking into consideration the contact pressure with the contacts. The circumference of the compression coil spring 6 and the contact pattern 2a is covered with a bellows 5 which is a flexible shield member. The FIAV 3 (the portion above the O-ring 7), the bellows 5 and the periphery of the substrate 2 are molded and insulated by a molding material 8.

As described above, according to the electrical connection structure of the component according to the first embodiment, the connection terminal 4 of the FIAV 3 and the contact pattern 2a of the substrate 2 are connected via the conductive compression coil spring 6. Since they are electrically connected, the number of connector pins can be reduced and the number of wiring steps can be reduced as compared with the conventional connection via a connector. Also, the harness itself can be reduced, which contributes to cost reduction.

Further, the connection terminal 4 and the contact pattern 2a
Are connected via the compression coil spring 6 and are not connected by soldering, so they can be detached for each unit, and unit replacement work can be easily performed in the market.

Further, since the elastic force of the compression coil spring 6 can be easily set and changed, the contact pressure between the contacts can be set as required, and the contact reliability can be improved. Further, since the compression coil spring 6 is elastically deformed, even if the positioning error between the FIAV 3 and the substrate 2 is large, the compression coil spring 6 is
This error can be absorbed by the elastic deformation of, and a decrease in reliability of connection due to a positioning error can be prevented.

Further, even if the FIAV 3 and the substrate 2 receive stress due to thermal deformation, or stress due to heat of the ECU case 1 or external stress, these stresses are absorbed by the elastic deformation of the compression coil spring 6, and the contact points are contacted. Connection is secured. Further, even if it receives vibration or impact, it is absorbed by the elastic deformation of the compression coil spring 6, and the connection between the contacts is secured.

Further, since the connection terminal 4 is press-fitted into the compression coil spring 6, it has a plurality of electrical contacts, and the connection is highly reliable. Further, even when auxiliary equipment or the like is additionally connected to the ECU and it is difficult to perform soldering later, connection via the compression coil spring 6 which does not require soldering as described above. According to this, it is possible to easily cope with this.

Further, since the connection terminal 4 is made of a magnetic material, the noise reduction effect can be enhanced without adding a separate member.

In the first embodiment described above, the example in which the electrical connection structure of the components is applied to the FIAV 3 or the ECU has been shown, but the present invention is not limited to this and can be applied to other electrical connection parts. Further, in the above-described first embodiment, an example in which the connection terminal 4 is formed of a magnetic body has been shown, but the present invention is not limited to this, and a magnetic body may be separately arranged at the axial center portion of the compression coil spring 6. .

Further, although the description has been given on the assumption that the circumference of the compression coil spring 6 and the contact pattern 2a is covered with the bellows 5 and is molded with the molding material 8, the present invention is not limited to this, and these may be appropriately provided if necessary. Good.

In the ECU, the above connection structure is
It can also be applied to internal connections of sensors (for example, throttle opening sensor, intake air pressure sensor, intake air temperature sensor, etc.), actuators, etc. In this case, these connected objects are stacked and stored in the unit case. , Can be connected all at once by caulking. Therefore, the soldering process can be eliminated and the assembly can be easily automated. further,
Since there is no soldering point inside the case, it is not necessary to confirm the quality of the soldered state.

It is also possible to provide an engine control device in which the ECU having the above-mentioned electrical connection structure and the throttle body are attached by attaching means (for example, screw means). Especially the engine controller
Since it is used under severe conditions against heat, vibration, external stress, etc., a highly reliable electrical connection structure can be provided, which is extremely effective.

Embodiment 2. FIG. 2 is a sectional view showing an electrical connection structure of components according to the second embodiment of the present invention. In the second embodiment, the connection terminal 2b is provided on the substrate 2 by the soldering portion 2c, and the connection terminal 2b and the FIA are connected to each other.
The connection terminal 4 of V3 is press-fitted and connected to the conductive compression coil spring 6. Other structures are the same as those in the first embodiment.
It is similar to the case of.

As described above, according to the electrical connection structure of the component according to the second embodiment, the connection terminal 4 of the FIAV 3 and the connection terminal 2b of the substrate 2 are electrically connected via the conductive compression coil spring 6. In this example, the same effects as those of the first embodiment can be obtained because they are connected to each other.

[0034]

As described above, according to the electrical connecting structure of the component according to the present invention, the conductive compression coil spring is compressed and disposed between the contacts of the component to be electrically connected, and In the electrical connection structure of components for electrically connecting the components, since the magnetic body is provided in the axial center of the compression coil spring, the compression coil spring can have a large inductance, It is possible to provide an electrical connection structure of components that is strong against noise and reliable. In addition, since the contacts are electrically connected via the conductive compression coil spring, the number of connector pins can be reduced and the number of wiring steps can be reduced as compared with the conventional connection via a connector. Also, the harness itself can be reduced, which contributes to cost reduction.

[Brief description of drawings]

FIG. 1 is a sectional view showing an electrical connection structure of a component according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing an electrical connection structure of a component according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view showing an example of a conventional electrical connection structure for components.

[Explanation of symbols]

1 ECU case 2 substrates 2a contact pattern 2b connection terminal 2c Soldering part 3 FIAV 3a convex part 3b recess 4 connection terminals 5 Bellows 6 compression coil spring 7 O-ring 8 Mold material

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuhiro Musashi             2480 Kuno, Odawara-shi, Kanagawa Co., Ltd.             Mikuni Odawara Office F-term (reference) 3G065 AA11 CA24 HA21                 3G301 HA01 JA17 JB04 PA07 PA10                       PA11

Claims (5)

[Claims] 1. An electrical connection structure of components, wherein a conductive compression coil spring is compressed and arranged between contacts of components to be electrically connected to electrically connect the components. An electrical connection structure for components, wherein a magnetic body is provided at the axial center of the compression coil spring. 2. The electrical connection structure for a component according to claim 1, wherein the magnetic body is also used as a connection terminal of the compression coil spring. 3. The electrical connection structure for a component according to claim 1, wherein the periphery of the compression coil spring and the contact are covered with a flexible shield member so as to be moldable. 4. A circuit board and at least one sensor of a throttle opening sensor, an intake pressure sensor, and an intake temperature sensor are provided by an electrical connection structure of parts according to any one of claims 1 to 3. ECU (Electronic Control U) characterized by being connected
nit). 5. The throttle body and the throttle body are produced in separate steps,
An engine control device comprising: an ECU case that stores the ECU according to claim 4; and an attachment unit that attaches the throttle body and the ECU case.